A double-blind study of the comparative effects of meperidine with secobarbital, hydroxyzine, or a placebo on labor and delivery.
D000328:Adult; D000773:Anesthesia, Obstetrical; D002986:Clinical Trials as Topic; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D006919:Hydroxyzine; D008614:Meperidine; D010919:Placebos / Q000494:pharmacology*; D011247:Pregnancy; D012631:Secobarbital
D010919:Placebos; D012631:Secobarbital; D006919:Hydroxyzine; D008614:Meperidine